Browsing by Issue Date, starting with "2013-05-02"

Now showing 1 - 20 of 31697

Ultrafast Time-Resolved Pump-Probe Spectroscopy of PYP by a Sub-8 fs Pulse Laser at 400 nm
(2013-05-02)
Liu, Jun
;
Yabushita, Atsushi
;
Taniguchi, Seiji
;
Chosrowjan, Haik
;
Imamoto, Yasushi
Impulsive excitation, of molecular vibration is known to induce wave packets in both the ground state, and excited State. Here, the ultrafast dynamics of PIP was studied by pump probe spectroscopy using a sub-8 fs pulse laser at 400 nm. The broadband spectrum of the UV pulse allowed us to detect the pump probe signal covering 360-440 nm. The dependence of the vibrational phase of the vibrational mode around 1155 cm(-1) on the probe photon energy was observed for the first time to our knowledge. The vibrational mode coupled to the electronic transition observed in the probe spectral ranges of 2.95-3.05 and 3.1573.35 eV was attributed to the. wave packets in the ground state and the excited state, respectively.: The frequencies in the ground state and excited state were determined: to be 1155 +/- 1 and 1149 +/- 1 cm(-1), respectively. The frequency difference is due to change after photoexcitation; This means a reduction of the bond strength associated with pi-pi* excitation, :which is related to the molecular structure. change associated with the primary isomerization process in the photocycle in PYP. Real time vibrational modes at low frequency around 138, 179, 203, 260, and 317 cm(-1) were also observed and compared with, the Raman spectrum for the assignment of the vibrational wave packet.
Hybrid Titania Photoanodes with a Nanostructured Multi-Layer Configuration for Highly Efficient Dye-Sensitized Solar Cells
(2013-05-02)
Wu, Hui-Ping
;
Lan, Chi-Ming
;
Hu, Jyun-Yu
;
Huang, Wei-Kai
;
Shiu, Jia-Wei
To construct a hybrid titania photoanode containing nanoparticles and nanorods of varied size in a multilayer (ML) configuration for dye-sensitized solar cells, the essence of our ML design is a bilayer system with additional layers of nanorods of well-controlled size inserted between the transparent and the scattering layers to enhance the light harvesting capability for photosensitizers with small absorptivity, such as Z907. We measured charge-extraction and intensity-modulated photoelectric spectra to show the advantages of one-dimensional nanorods with an improved electron-transport property and an upward shift of the potential band edge; a favorable ML configuration was constructed to have a cascade potential feature for feasible electron transport from long nanorods, to normal nanorods, to small nanoparticles. On the basis of the ML system reported herein, we demonstrate how the performance of a Z907 device is improved to attain eta similar to 10%, which is a milestone for its future commercialization.
Sloped-Gate Voltage Method for Improving Measurement of Poly-Si Nanowire FET in Aqueous Environment
(2013-05-02)
Chen, Chien-Hung
;
Su, Yi-Jr
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Lin, Chih-Heng
;
Liao, Tai-Shan
;
Yang, Yuh-Shyong
Nanowire field-effect transistors are suited to. study the activity of biomolecules in bionanotechnology. The changes of biomolecules process are efficiently affected the charge at the nanowire surface; thus, the electrical characterization of NW-FET is Changed. Although NW-FET is a well-known device in bioapplications, however, the intrinsic electrical characterization of NW-FET effect, on real electrical measurement is not well studied. We present herein a novel measurement method to avoid errors in electrical characteristic of nanowire field-effect transistors. A physical model is developed to explore the effect of the leakage current, which is influenced by the charging effect of an equivalent capacitor in a NW-FET. We also present a sloped-gate voltage method to reduce the effect, of equivalent capacitor in air, liquid, and phosphate buffered solution. The application of the sloped gate voltage Method significantly increases the stability of electrical characterization measurements. This method can also be easily applied to biosensing experiments.
CYCLIC CODE DECODING METHOD AND CYCLIC CODE DECODER
(2013-05-02)
Lin Yi-Min
;
Hsu Chih-Hsiang
;
Chang Hsie-Chia
;
Lee Chen-Yi
In a cyclic code decoding method, a decoder analyzes a received codeword to identify unreliable symbols in the codeword, and sets candidate syndrome patterns accordingly. Then, a syndrome calculator calculates evaluated syndrome values associated with one of the candidate syndrome patterns, and an error location polynomial (ELP) generator generates an ELP according to the syndrome values. An error correction device corrects the errors in the codeword according to theELP when a degree of the ELP is not more than a threshold value, and the syndrome calculator adjusts the syndrome values and the ELP generator generates another ELP according to the adjusted syndrome values when otherwise.
METHOD AND DEVICE FOR ACQUIRING A CODE PHASE SHIFT BETWEEN AN INPUT SEQUENCE AND A REFERENCE SEQUENCE
(2013-05-02)
Kao Ming-Seng
;
Chang Chieh-Fu
;
Hsieh Wan-Hsin
A method for acquiring a code phase shift between an input sequence and a reference sequence is provided. The method is to be implemented using an acquisition device that includes a mapping unit configured to transform the input sequence and the reference sequence respectively into an input signal and a reference signal each with a complex phase, a comparison unit configured to compare the input signal with the reference signal so as to obtain a phase coherent indicator, and calculating unit configured to obtain the code phase shift between the input sequence and the reference sequence based on a phase of the phase coherent indicator and a number of bits of the input sequence.
Autothermal steam reforming of ethanol over La2Ce2-xRuxO7 (x=0-0.35) catalyst for hydrogen production
(2013-05-02)
Weng, Sheng-Feng
;
Wang, Yun-Hsin
;
Lee, Chi-Shen
;
應用化學系
;
Department of Applied Chemistry
Pyrochlore phases solid solutions, La2Ce2-xRuxO7 (x=0-0.35) were prepared with a sol-gel process and used as catalysts for the autothermal steam reforming of ethanol. The samples as prepared were characterized with powder X-ray diffraction (PXRD), X-ray photoelectron spectra (XPS), and temperature-programmed reduction (TPR). The XPS and TPR spectra revealed the effect of doped Run+ to oxidation states of La and Ce sites. The low temperature reduction ability and relative concentration of Ce4+ ions are increased as the cell-dimension decreased. Tests of catalytic activity showed that the reforming performance of La2Ce2-xRuxO7 catalysts was affected by the Ru/Ce loading ratio. For all catalysts, partial oxidation was favored at a large C/O composition; incomplete ethanol conversion was observed for C/O >= 0.7. The optimized catalyst was La2Ce1.8Ru0.2O7 with hydrogen production rate (r(H2)) 2.01 x 10(-3) mol s(-1) g(cat)(-1) (autothermal temperature similar to 600 degrees C and 97% ethanol conversion at C/O=0.6). The catalyst exhibited stable r(H2) over 26 h of the reaction with ethanol conversion >95%. r(H2) of the catalyst gradually decreased thereafter because LaAlO3 started to formed and affected catalytic process. For the catalyst, the Ru ions remained well dispersed before and after the AESR reaction. (C) 2013 Elsevier B.V. All rights reserved.
Immunocapture couples with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry for rapid detection of type 1 dengue virus
(2013-05-03)
Chen, Wen-Hung
;
Hsu, I-Hsiang
;
Sun, Yuh-Chang
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Wang, Yu-Kuo
;
Wu, Tung-Kung
A facile method for accurate detection of type I dengue virus (DV1) infection from complex biological mixtures, using type specific immunocapture coupled with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS), was developed. The biological mixtures were treated with magnetic particles coated with a monoclonal antibody directly against type 1 dengue virus. After immunocapture purification, the DV1 was eluted with 30% acetic acid, directly spotted with seed-layer method, and analyzed by MALDI-TOF MS for DV1 capsid protein. The detection limit of the assay was similar to 10(5) pfu/mL by MALDI-TOF MS. The immunocapture could unambiguously differentiate the DV1 from other serotypes of the dengue viruses and Japanese encephalitis virus, and could be used as a specific probe to detect DV1 from complex biological mixtures. (C) 2013 Elsevier B.V. All rights reserved.
新聞之於我　理想與現實
(2013-05-05)
尤意茹
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Department of Communication and Technology
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傳播與科技學系
我懷念那個人人看報的時代，但是我不知道有哪些時刻，新聞是可以完全被信任的，從政府到財團，甚至是被觀眾控制，到底應該由誰來決定我們應該接受到什麼樣的訊息？
日本　遊祭
(2013-05-05)
鄭姿筠
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Department of Communication and Technology
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傳播與科技學系
日本多采多姿的祭典，不只日本人喜歡，許多非日本人也深深著迷。幾年前曾流行過主題式旅行，就有人以「祭典」為主題在日本四處旅行，目標是將感興趣的祭典一網打盡，非常有意思。
我的一趟社企之旅
(2013-05-05)
姚映竹
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Department of Communication and Technology
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傳播與科技學系
太清楚自己對於這個領域仍然遙遠陌生而又模糊，但過於好動的探奇觸手卻是巴不得能探向這片神祕湛藍的海。於是，即使早被系上學分數壓得喘不過氣，我仍然在這時刻選擇了一堂外系課，透過課堂接觸到劉大姊與她的社會企業。
清大阿特梅　藝術破蛹
(2013-05-05)
李佩玹
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Department of Communication and Technology
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傳播與科技學系
由兩位清大學生總籌以Art May藝術五月為諧音，擴大舉辦了阿特梅藝術季。以「蛹」為概念，盼望藝術能在清大破蛹而出。5/3舉行的文創工作坊，帶領學員親自創作紙藝作品，體驗手作的樸實美好。
海線五寶　古色的木造車站
(2013-05-05)
歐士豪
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Department of Communication and Technology
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傳播與科技學系
縱貫鐵路上，保留著五座日式的木造車站，談文、大山、新埔、日南、追分，這五站被稱為海線五寶。
歷史書籍的轉變　好與壞
(2013-05-05)
張睿文
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Department of Communication and Technology
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傳播與科技學系
歷史，可以說是每一段不同的故事。但該怎麼說故事，是取決於每個歷史作者的表達方式。為吸引讀者，歷史書籍開始有不同的花樣。
茶與咖啡　東西大不同
(2013-05-05)
張芮瑜
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Department of Communication and Technology
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傳播與科技學系
咖啡與茶是現代人生活中很常接觸到的兩項飲品，不論在味覺、視覺或是製作方法、飲用方式上都有很大的不同，但是兩種飲品同樣高規格講求製作過程的每一個步驟，卻有異曲同工之妙。
乘著夜鶯　舞出希望
(2013-05-05)
白婞嫈
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Department of Communication and Technology
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傳播與科技學系
兒童芭蕾舞劇《乘著夜鶯的翅膀》，5月4日、5日在新北市藝文中心演藝廳演出。除成人演出主要角色外，台北市東門國小舞蹈班的孩童也參與演出。小朋友們在舞劇中的演出，替全劇增添活潑氣氛。
愛美　高跟鞋迷思
(2013-05-05)
廖敏廷
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Department of Communication and Technology
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傳播與科技學系
腳上的鞋子，可以展現個人的穿著風格。但在選擇自己喜愛的鞋子時，有沒有發現，它也可能對腳造成傷害？
認識台灣傳統藝術之美
(2013-05-05)
陳儀澧
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Department of Communication and Technology
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傳播與科技學系
傳統是具有傳承以往生活的意涵，而藝術則是人們對日常生活的感受，加以創造，並令其具有美感的呈現。傳統藝術則是融合當地的風俗民情、思想文化以及宗教思想所呈現出來。
學生拼創業　全民享共乘
(2013-05-05)
林妍君
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Department of Communication and Technology
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傳播與科技學系
由一群台大學生建立的Carpo網，是一個汽車共乘的線上平台。他們從身邊遇到的問題發想，最後決定自己創造解決方法。
浴女好聲音　公民好素養
(2013-05-05)
王宗瑜
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Department of Communication and Technology
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傳播與科技學系
一群女孩住在同一棟宿舍，難免會因彼此習慣不同而有摩擦，但也造就了許多有趣的小插曲，考驗每個人的公民素養。近日來，每當到了晚間，交通大學女二舍的公共浴室除了淋浴的水聲之外，也開始出現愉悅高亢的歌聲二重唱，傳遍了整層樓，引發居民不同的反應。
打造特殊孩童的小天地
(2013-05-05)
戴裕蒨
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Department of Communication and Technology
;
傳播與科技學系
照顧一個有特殊需求的孩子，面對社會大眾的不了解，就學、托育、醫療等資源的缺乏，父母需要付出加倍的心力。在新竹，心路基金會成立兒童發展中心，提供日托的服務，期許社會大眾能給予支持，成就孩子們最大的可能。